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EnglishMost members of the Enterobacteriaceae and Pseudomonas aeruginosa possess an inducible chromosomal class I β-lacta-mase. Bacterial strains which produce high levels of β-lacta-mase constitutively can be isolated from infections; these de-repressed mutants are responsible for resistance to third-gen-eration cephalosporins and ureidopenicillins. Minimum inhibitory concentrations of cefpirome, a fourth-generation cephalosporin, and other β-lactam antibiotics were determined for a series of mutants of Citrobacter freundii, Enterobacter cloacae, Morganella morganii, Proteus vulgaris and Seiratia marcescens with inducible stably derepressed or basal expression of chromosomal class I β-lactamases. All the antibiotics tested were almost equally active against β-lactamase-inducible organisms and their basal mutants. Imipenem and cefpirome showed better activity against derepressed mutants than third-generation cephalosporins and ureidopenicillins. © 1994 S. Karger AG, Basel.
| Titolo: | In vitro activity of cefpirome against beta-lactamase-inducible and stably derepressed enterobacteriaceae | |
| Autori interni: | ||
| Data di pubblicazione: | 1994 | |
| Rivista: | ||
| Handle: | http://hdl.handle.net/20.500.11769/335189 | |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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